Cartesia
Low-latency voice AI models (Sonic TTS, Ink STT) and a voice-agent platform, built on state-space model architecture.
Last verified:
Cartesia is a voice AI company founded by researchers behind the Mamba state-space-model architecture, offering Sonic (text-to-speech, ~90ms time-to-first-audio, voice cloning from 5 seconds of speech), Ink (speech-to-text), and Line (a voice-agent platform), deployable in the cloud, on-premise, or on-device. It provides a credit-based freemium/usage pricing model, a REST and WebSocket API with official Python and JS/TS SDKs, and an official open-source MCP server for coding agents. Founded in 2023, Cartesia raised a $27M seed round (Dec 2024) followed by a $64M Series A led by Kleiner Perkins (March 2025), and targets financial services, healthcare, and government customers requiring data residency and compliance.
Pricing
| Tier | Price | Key features |
|---|---|---|
| Free | $0/monthly | Text-to-Speech, Speech-to-Text, No voice cloning |
| Pro | $5/monthly | Commercial license, Instant voice cloning |
| Startup | $49/monthly | Professional voice cloning, Organizations |
| Scale | $299/monthly | Priority support, High concurrency limits |
| Enterprise | Custom | Custom concurrency, DPAs/BAAs, Shared Slack support, SSO, Security assessments |
Source: https://cartesia.ai/pricing
Agent-readiness
- Discoverability
- 52/100
- Machine-readable content
- 62/100
- Programmatic access
- 80/100
- MCP / agent support
- 65/100
- Self-serve transactability
- 75/100
- Transparency
- 55/100
Security & compliance
- SSO / SAML
- Yes
- Encryption at rest
- Not publicly documented
- Encryption in transit
- Not publicly documented
- Audit log
- Not publicly documented
- Pentest report
- Not publicly documented
"Not publicly documented" means Crail found no public evidence either way — not a confirmed absence. See our methodology. Trust center: https://trust.cartesia.ai.
FAQ
Does Cartesia have a free tier?
Yes, Cartesia offers a free tier or free trial.
Can you buy Cartesia without talking to sales?
Yes, Cartesia can be purchased self-serve without a sales call.
Does Cartesia have an official MCP (Model Context Protocol) server?
Yes, Cartesia publishes an official MCP server (https://github.com/cartesia-ai/cartesia-mcp).
Reviews
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Methodology & disclosure
Data verified via agent crawled, last checked 2026-07-27. Agent-readiness methodology version crail-ar-v0.1. No vendor payment influences these scores — see our methodology page.